Heavy metal pollution has become one of the most serious environmental problems today. Biosorption, regarded as a cost-effective biotechnology for treating heavy metal of low concentration in wastewater, has not been utilized at large scale successfully. It’s helpful to increase the knowledge of biosorption mechanism and decreasing the costs of biosorbents for the biosorption application. The yeast of Saccharomyces cerevisiae is an ideal biomaterial to be used for exploring the mechanism and for actual utilization because of its unique characteristics in spite of its relatively mediocre capacity of metal uptake to other fungi. The yeast can grow easily in cheap media, and is widely used in food and beverage manufacture. It’s also a safe by-product in large quantity as a waste of the fermentation industry, and easily manipulated at molecular level. The metal uptake specifically by S. cerevisiae was addressed. Firstly, it was discussed to use dead or live cells in biosorption . The yeast can absorb toxic heavy metals (Pb, Hg, Cd, etc), precious metals (Au, Ag, Pd, etc) and radionuclides (U, Am, etc). Secondry, metal-binding capacity of various heavy metals by S. cerevisiae in different conditions were compared. Lead and uranium, for instances, can be effectively removed from dilute solutions, while copper is not easily removed. Thirdly, various mechanism of metal uptake by S. cerevisiae were summarized in details according to the position in which metals are located. Metal uptake process is influenced by the ratio of the initial concentration of metal ions and the concentration of biomass. Cellular wall and its components are important for metal uptake. Functional groups for metallic ion fixation have been identified. Uptake is typically accompanied by ion exchange and complexation, sometimes with precipitation (for Pb) and redox (for Au or Ag). Intracellularly accumulated metal is associated with the cell membrane, vacuole and GSH, but may also be bound to other cellular organelles and biomolecules. The equilibrium and kinetic models used in the metal-yeast biosorption systems were also introduced. In most cases, classic Langmiur model and Freundlich model, widely used to describe single metal biosorption system of equilibrium, fit the experimental data very well. Pseudo-second order equation is often employed to describe biosorption process by S. cerevisiae. Finally, futher researches in metal biosorpiton by S. cerevisiae were proposed.

OBJECTIVE: To optimize the preparation process of Xiangsha Liujun Granule. METHODS: By the orthogonal design. taking the rates of recovery of volatile oil, Ginsenoside Re and qualified granules as the indexes, we optimized the oil extracting conditions, the decocting conditions and the conditions of granulation by spayer. RESULTS: The optimum oil ex- tracting conditions for four kinds of herbs(Pericarpium Citri Reticulatae etc.) were that water was 30 times of herbs in weight, soaking time was 3 hours and extracting time 15 hours. The optimum decocting conditions for four kinds of herbs(Fuling etc.) were that water was 15 times of herbs in weight, soaking time was 3 hours and decocting time 4 hours, herbs were decocted twice. The optimum conditions of granulation by sprayer were that the fliud extract was 2 times of Dextrin in weight, the rel- ative density of the fliud extract was 1. 30(measured at 25℃), the voltage of sprayer was 120 volts, the period of shaking bag was 65 times(shaking bag back and forth twice in each period). CONCLUSION: The results of the experiment make it clear that the preparation process of Xiangsha Liu jun Granule is stable and feasible.

Objective To explore the effect of manipulation on muscle tension and motor function of children with spastic cerebral palsy.Methods 80 children with spastic cerebral palsy were divided into observation group and control group with 40 cases in each group.Both groups were treated with exercise, acupuncture, electrotherapy, Chinese medicine steam bath. The observation group received massage treatment before and during exercise treatment. Modified Ashworth Scale (MAS) and Gross Motor Function Measure-88 (GMFM-88) were used to evaluate the muscle tension and motor function. Results 3 months after treatment, the MAS score decreased and the score of GMFM-88 increased significantly in both groups (P<0.001), and the MAS score was lower, and the score of GMFM-88 was higher in the observation group than in the control group (P<0.001). Conclusion Manipulation can further improve the muscle tension and the motor function of children with spastic cerebral palsy.

Abstract: Malaria, an infectious disease caused by Plasmodium infection, is one of the most important public health problems worldwide. Artemisinin-based combination therapies (ACTs) are recommended by WHO as the first-line treatment for uncomplicated P. falciparum malaria in malaria-endemic areas. The application of artemisinin and its derivatives has played an integral role in reducing the global incidence of malaria. However, in recent years, the emergence and spread of artemisinin resistance has brought great challenges to global malaria control and elimination. At present, the mutation of K13 gene on chromosome 13 of Plasmodium falciparum is most closely related to artemisinin resistance, but in recent years, studies have shown that K13 cannot explain all artemisinin resistance. This article reviews the recent research progress in the field of artemisinin resistance in Plasmodium falciparum, including definition of artemisinin resistance, detection methods and molecular markers related to resistance. In addition, some of the issues discussed in this review remain controversial and require further study.

Aims: This study aimed to isolate the fungal strains causing brown spot disease on dragon fruit and identify them using molecular biology techniques. The study also investigated the inhibitory effects of silver (Ag) and ZnO nanoparticles on the isolated fungal strains. Methodology and results : Six fungal strains (TL1, TL2, TL3, TL4, TL5, TL6) causing brown spot disease (stem-canker) were isolated. TL1 and TL2 isolates were used for testing the antifungal features of nanoparticles. Nanoparticles were directly added to the PDA medium to make a solution with concentrations of 50, 75 and 100 ppm. The antifungal feature of nanoparticles was screened by inoculating with the fungal samples for 72 h. The inhibitory capacity of ZnO and Ag nanoparticles against fungal strains was then investigated. TL1 and TL2 samples were identified as Neocytalidium dimidiatum using the internal transcribed spacer (ITS) region. The study also revealed that silver nanoparticles were more effective than zinc oxide nanoparticles in inhibiting the growth of fungal strains that cause brown spot disease on dragon fruit. Specifically, ZnO nanoparticles had the highest inhibitory effect on TL2, 61.27% at 100 ppm and Ag nanoparticles gave the highest inhibitory effect on TL2, 85.83% at 100 ppm. Conclusion, significance and impact of study The research findings suggest that the use of Ag and ZnO nanoparticles may be an effective way to control brown dragon fruit spot disease. It may help in improving dragon fruit yield and aesthetic quality. As a result, it may help in reducing economic loss for farmers. However, further research is required.

Objective To explore anti-EV71 effects of Ganlu Xiaodudan in vitro. Methods Ribavirin was taken as control drug, with the help of cell culture to observe anti-EV71 inhibition rate of Ganlu Xiaodudan in inhibiting-virus-directly experiment, therapeutic-inhibiting-virus experiment, preventive-inhibiting-virus experiment and preventive-therapeutic-inhibiting-virus experiment. Results In inhibiting-virus-directly experiment, therapeutic-inhibiting-virus experiment and preventive-therapeutic-inhibiting-virus experiment, virus inhibition rate of Ganlu Xiaodudan was higher than ribavirin. In preventive-inhibiting-virus experiment, virus inhibition rates of Ganlu Xiaodudan and ribavirin both were almost zero. Conclusion Ganlu Xiaodudan has better antiviral effects on EV71 than ribavirin, and it can affect more than one link of multiplication of EV71.

OBJECTIVETo investigate the characteristics of Zn2+ biosorption and the release of cations during the process of Zn2+ biosorption by intact cells of Saccharomyces cerevisiae.

METHODSThe batch adsorption test was used to study the biosorption equilibrium and isotherm. Zn2+ concentration was measured with atomic adsorption spectrophotometer (AAS) AAS 6 Vario.

RESULTSWhen the initial concentration of Zn2+ ranged between 0.08 and 0.8 mmol/L, the initial pH was natural (about 5.65), the sorbent concentration was about 1 g/L and the capacity of Zn2+ biosorption was from 74.8 to 654.8 micromol/g. The pH value increased by 0.55-1.28 and the intracellular cations (K+, Mg2+, Na+, Ca2+) of the cells were released during the process of Zn2+ biosorption.

CONCLUSIONIon exchange was one of the mechanisms for Zn2+ biosorption. The biomass of Saccharomyces cerevisiae is a potential biosorbent for the removal of Zn2+ from aqueous solution. More work needs to be done before putting it into practical application.

Objective To investigate the clinical value and prenatal diagnosis feasibility of fetal aberrant right subclavian artery(ARSA) with fetal echocardiography.Methods The data of 39 fetuses with ARSA were retrospectively reviewed.The prenatal and postnatal medical records,including the presence of fetal abnormalities,cardiac defect,karyotype and the outcomes of each pregnancy were collected.Results The echocardiographic feature of ARSA was that an ARSA arises as a fourth branch of the arch,from the descending aorta behind the trachea,crosses the thorax between the trachea and the spine,to reach the right arm.The overall incidence of ARSA was 2.3 ％ (39/17 280),23 cases (59.0 ％) as an isolated malformation,16 cases (41.0％) combined with cardiac defect and extracardiac abnormalities,9 cases (23.1％) with chromosomal abnormalities.23 cases underwent termination of pregnancy,2 cases died in uterus and 14 cases were born live.Isolated ARSA group had lower incidence of chromosomal abnormalities (8.7％ vs 43.8 ％,P ＜ 0.05) and higher fetal survival rate (56.5％ vs 6.2％,P ＜0.05) than the combined detects group.Conclusions The fetus with ARSA complicated with aneuploid karyotype,cardiac defects and extracardiac anomalies are at hight risk of poor prognosis.

Objective To study the effect of the recombinant Lentivirus containing calcitonin gene related peptide (CGRP) gene on cells biological activity and differentiation of rat bone marrow stem cells(MSCs).Methods Rat MSCs were isolated and cultured by granulocytes adherent.MSCs were transfected with Lenti-EGFP CGRP(MSCsCGRP+/+ group),While MSCs were transfected with Lenti-EGFP as control group.Cell transfection rate was detected by flow cytometry,protein secretion in the above-mentioned MSCsCGRP+ + supernatant was detected using ELISA method.Cells surface markers weare detected by flow cytometry and immunohistochemistry.Trypan blue was used to examin the survive rate,β galactosidase staining was used to examin aging of MSCs transfection,and MTT was used to examine cell vitality.Results At first day after transfecting with Lenti-EGFP-CGRP,fluorescence was not observed by fluorescence microscope,but a small amount of CGRP protein was detected by ELISA in MSCsCGRP+/+ group,at 3 days and 4 days after transfecting with MSCs,strong fluorescence was observed by fluorescence microscope (the cell transfection rates were 77.87％ and 79.58％).The CGRP expression was significantly higher in MSCsCGRP+ + group than in control group [(19.53±0.50) pg/ml vs.(3.12±0.00) pg/ml,t=48.964,P＜0.01].At three days after transfection with MSCs,CD29 and CD90 expression were significantly higher,as compared with control group,CD31 expression was increased in MSCsCGRP+ /+ group.Seven days after transfection with MSCs,CD31 expression was significantly increased in MSCsCGRP+ + group,vWF expression was significantly increased in MSCsCGRP+ + group after MSCs were transfected with LentiEGFP CGRP for 14 days,but a SMA expression was decreased in MSCsCGRP+ +group.At 3 days and 7 days after transfection with Lenti-EGFP-CGRP,the proliferation,survive and aging showed no difference in MSCsCGRP+/+group and in control group (the proliferation of cell:t=0.253,0.290the survive of cell t=-0.307,0.690,all P＞0.05).At 14 days after transfection with Lenti-EGFP-CGRP,aging of cell were decreased in MSCsCGRP+ + group as compared with control group (t=2.446,P＜ 0.05).Conclusions After MSCs are transfected with Lenti EGFP-CGRP,biological characteristics of MSCs has no significant effects,there is still proliferation and differentiation activity.Cell secretion of CGRP can promote the endothelial cell differentiation,and inhibit the differentiation to smooth muscle cells.The CGRP modification of MSCs may play a role in the regulation of angiogenesis.

HPS1-D, an active polysaccharide,was isolated and purified from Hedysarum polybotrys. HPS1-D was obtained after treated with Savage method and H2O2, and purified with DEAE-cellulose 52 and Sephadex G-100 gel filtration chromatography. Then physicochemical property analysis, GC, methylation, partial acid hydrolysis, and NMR method were used to study chemical structural of HPS1-D. The conformation was primarily analyzed with GPC-MALLS method and Congo red reaction. The anti-complementary activity of HPS1-D was evaluated with the hemolysis assay. HPS1-D was a heteropolysaccharide and consisted of D-glucose, L-arabinose, (7.2:1.3). HPS1-D proved to be a neutral sugar, with 1, 4-and 1, 4, 6-alpha-D-glucopyranosyl residues in backbone ,and 1, 5-and 1, 3, 5-alpha-L-arabinofuranosyl residues in branches. HPS1-D has a random coil state conformation with monodisperse mass distribution in 0.9% NaCl solution. And HPS1-D had triple-helix conformation in concentrate of NaOH solution. Anti-complementary activity of HPS1-D was closed to its positive control heparin.
Animals ; Drugs, Chinese Herbal ; chemistry ; pharmacology ; Hemolysis ; drug effects ; Mice ; Plant Extracts ; chemistry ; pharmacology ; Polysaccharides ; chemistry ; pharmacology